JaggedVecConversions.cxx

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/*
 * Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration.
 */
 
 
#include "AthContainers/tools/JaggedVecConversions.h"
 
 
namespace SG { namespace detail {
 

void JaggedVecProxyBase::resize1 (size_t elt_index, index_type n_new)
{
  int n_old = elt (elt_index).size (elt_index);
  adjust1 (elt_index, n_old, static_cast<int>(n_new) - n_old);
}
 

void JaggedVecProxyBase::adjust1 (size_t elt_index, index_type index, int n_add)
{
  // Return right away if there's nothing to do.
  if (n_add == 0) return;
 
  // Find the IAuxTypeVector for the payload variable.
  IAuxTypeVector* linkedVec;
  if (m_linkedVec.index() == 0) {
    // We already have it.
    linkedVec = std::get<0>(m_linkedVec);
  }
  else {
    // Look it up from the container.
    SG::auxid_t auxid = std::get<1>(m_linkedVec);
    linkedVec = m_container.getStore()->linkedVector (auxid);
 
    // Remember it to possibly use again.
    m_linkedVec = linkedVec;
  }
 
  // Indices from the element that we're modifying.
  Elt_t& e = elt(elt_index);
  size_t beg = e.begin(elt_index);
  size_t end = e.end();
 
  // Shift the payload items.
  if (!linkedVec->shift (beg+index, n_add)) {
    m_container.clearCache (linkedVec->auxid());
  }
 
  // Adjust the indices in the jagged vector elements.
  // First the element that we're modifying...
  e = JaggedVecEltBase (end + n_add);
  // .. then all the remaining elements.
  std::ranges::for_each (m_elts | std::views::drop (elt_index+1),
                         JaggedVecEltBase::Shift (n_add));
}
 
 
} } // namespace SG::detail